EC2053 ENGINEERING ACOUSTICS L T P C3 0 0 3
UNIT I ACOUSTICS WAVES 9
Acoustics waves - Linear wave equation - sound in fluids - Harmonic plane waves -Energy density - Acoustics intensity - Specific acoustic impedance - spherical waves -Describer scales.Reflection and Transmission:oblique incidence - method of images.Transmission from one fluid to another normal
UNIT II RADIATION AND RECEPTION OF ACOUSTIC WAVES 9
Radiation from a pulsating sphere - Acoustic reciprocity - continuous line source -radiation impedance - Fundamental properties of transducers.Absorption and attenuation of soundAbsorption from viscosity - complex sound speed and absorption - classical absorptioncoefficient
UNIT III PIPES RESONATORS AND FILTERS 9
Resonance in pipes - standing wave pattern absorption of sound in pipes - longwavelength limit - Helmoltz resonator - acoustic impedance - reflection and transmissionof waves in pipe - acoustic filters - low pass, high pass and band pass.Noise, Signal detection, Hearing and speechNoise, spectrum level and band level - combing band levels and tones - detectingsignals in noise - detection threshold - the ear - fundamental properties of hearing -loudness level and loudness - pitch and frequency - voice
UNIT IV ARCHITECTURAL ACOUSTICS: 9
Sound in endosure - A simple model for the growth of sound in a room - reverberationtime - Sabine, sound absorption materials - measurement of the acoustic output ofsound sources in live rooms - acoustics factor in architectural design.Environmental Acoustics:Weighted sound levels speech interference - highway noise - noise induced hearingloss - noise and architectural design specification and measurement of some isolationdesign of portions.
UNIT V TRANSDUCTION 9
Transducer as an electives network - canonical equation for the two simple transducerstransmitters - moving coil loud speaker - loudspeaker cabinets - horn loud speaker,receivers - condenser - microphone - moving coil electrodynamics microphonepiezoelectric microphone - calibration of receivers.
TOTAL = 45 PERIODS
TEXT BOOK:
1. Lawrence E.Kinsler, Austin, R.Frey, Alan B.Coppens, James V.Sanders,Fundamentals of Acoustics, 4th edition, Wiley, 2000.REFERENCE:1. L.Beranek, "Acoustics" - Tata McGraw-Hill
UNIT I ACOUSTICS WAVES 9
Acoustics waves - Linear wave equation - sound in fluids - Harmonic plane waves -Energy density - Acoustics intensity - Specific acoustic impedance - spherical waves -Describer scales.Reflection and Transmission:oblique incidence - method of images.Transmission from one fluid to another normal
UNIT II RADIATION AND RECEPTION OF ACOUSTIC WAVES 9
Radiation from a pulsating sphere - Acoustic reciprocity - continuous line source -radiation impedance - Fundamental properties of transducers.Absorption and attenuation of soundAbsorption from viscosity - complex sound speed and absorption - classical absorptioncoefficient
UNIT III PIPES RESONATORS AND FILTERS 9
Resonance in pipes - standing wave pattern absorption of sound in pipes - longwavelength limit - Helmoltz resonator - acoustic impedance - reflection and transmissionof waves in pipe - acoustic filters - low pass, high pass and band pass.Noise, Signal detection, Hearing and speechNoise, spectrum level and band level - combing band levels and tones - detectingsignals in noise - detection threshold - the ear - fundamental properties of hearing -loudness level and loudness - pitch and frequency - voice
UNIT IV ARCHITECTURAL ACOUSTICS: 9
Sound in endosure - A simple model for the growth of sound in a room - reverberationtime - Sabine, sound absorption materials - measurement of the acoustic output ofsound sources in live rooms - acoustics factor in architectural design.Environmental Acoustics:Weighted sound levels speech interference - highway noise - noise induced hearingloss - noise and architectural design specification and measurement of some isolationdesign of portions.
UNIT V TRANSDUCTION 9
Transducer as an electives network - canonical equation for the two simple transducerstransmitters - moving coil loud speaker - loudspeaker cabinets - horn loud speaker,receivers - condenser - microphone - moving coil electrodynamics microphonepiezoelectric microphone - calibration of receivers.
TOTAL = 45 PERIODS
TEXT BOOK:
1. Lawrence E.Kinsler, Austin, R.Frey, Alan B.Coppens, James V.Sanders,Fundamentals of Acoustics, 4th edition, Wiley, 2000.REFERENCE:1. L.Beranek, "Acoustics" - Tata McGraw-Hill
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